Superlative Primary Mirrors
The largest optical telescope in the world as of 2009 to use a non-segmented single-mirror as its primary mirror is the 8.2 m (8.7 yards) Subaru telescope of the National Astronomical Observatory of Japan, located in Mauna Kea Observatory on Hawaii since 1997; however, this is not the largest diameter single mirror in a telescope, the U.S./German/Italian Large Binocular Telescope has two 8.4 m (9.2 yards) mirrors (which can be used together for interferometric mode). Both of these are smaller than the 10 m segmented primary mirrors on the two Keck telescope. Radio and submillimeter telescopes use much larger dishes or antennae, which do not have to be made as precisely as the mirrors used in optical telescopes. The Hubble Space Telescope has a 2.4 m (7 ft 10 in) primary mirror.
Read more about this topic: Primary Mirror
Famous quotes containing the words superlative, primary and/or mirrors:
“You say there is no religion now. ‘Tis like saying in rainy weather, there is no sun, when at that moment we are witnessing one of his superlative effects.”
—Ralph Waldo Emerson (1803–1882)
“Parental attitudes have greater correlation with pupil achievement than material home circumstances or variations in school and classroom organization, instructional materials, and particular teaching practices.”
—Children and Their Primary Schools, vol. 1, ch. 3, Central Advisory Council for Education, London (1967)
“My own voice spoke to people,
anyone, friends, strangers on the street, saying,
“I am Mr. Rabbit.” The flesh itself had become mad
and at three mirrors this was confirmed.”
—Anne Sexton (1928–1974)